The famous Doctor Yellow is a special Shinkansen that inspects the tracks and overhead equipment of the Shinkansen line.  This three-car Pla-Rail set includes lights, and all three cars can be connected and disconnected; move the switch to the "off" position to roll it along by hand
 
Requires one AA-size battery.
Track shown in the picture is not included.
 
Train History:
 
 
Doctor Yellow (ドクターイエロー) is the nickname for the high-speed test trains that are used on the Japanese Shinkansen ("Bullet Train") dedicated express passenger train routes. The trains have special equipment on board to monitor the condition of the track and overhead wire, including special instrumented bogies and observation blisters.[1]
The "Doctor" part of the name is from their test and diagnostic function, and the "Yellow" part comes from the bright yellow color they are all painted. Some have a blue waistline stripe, some a green one. The original color scheme of yellow with a blue stripe (applied to the Class 921 track-recording cars) was created by reversing the colors (blue with yellow stripe) used on 1,067 mm (3 ft 6 in) narrow-gauge track-recording cars.